<?php
// Ex04_answer.php

$dsn = "mysql:host=localhost;dbname=employee_db;charset=utf8";
$username = "rezouser";
$password = "Rezo_0000";

try {
    $pdo = new PDO($dsn, $username, $password);
    $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

    $salary = isset($_POST['salary']) ? (float)$_POST['salary'] : 1000;
    $id = isset($_POST['id']) ? (int)$_POST['id'] : 1;

    $stmt = $pdo->prepare("UPDATE employees SET salary = :salary WHERE id = :id");
    $stmt->bindParam(':salary', $salary, PDO::PARAM_INT);
    $stmt->bindParam(':id', $id, PDO::PARAM_INT);
    $stmt->execute();

    echo "更新しました";
} catch (PDOException $e) {
    echo "エラー: " . $e->getMessage();
} finally {
    $pdo = null;
}